.\" Copyright 1995 Michael Chastain (mec@shell.portal.com), 15 April 1995.
.\"
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.\" Updated, aeb, 980612
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.TH UNIMPLEMENTED 2 2021-03-22 "Linux" "Linux Programmer's Manual"
.SH NAME
afs_syscall, break, fattach, fdetach, ftime, getmsg, getpmsg, gtty, isastream,
lock, madvise1, mpx, prof, profil, putmsg, putpmsg, security,
stty, tuxcall, ulimit, vserver \- unimplemented system calls
.SH SYNOPSIS
.nf
Unimplemented system calls.
.fi
.SH DESCRIPTION
These system calls are not implemented in the Linux kernel.
.SH RETURN VALUE
These system calls always return \-1 and set
.I errno
to
.BR ENOSYS .
.SH NOTES
Note that
.BR ftime (3),
.BR profil (3),
and
.BR ulimit (3)
are implemented as library functions.
.PP
Some system calls, like
.BR alloc_hugepages (2),
.BR free_hugepages (2),
.BR ioperm (2),
.BR iopl (2),
and
.BR vm86 (2)
exist only on certain architectures.
.PP
Some system calls, like
.BR ipc (2),
.BR create_module (2),
.BR init_module (2),
and
.BR delete_module (2)
exist only when the Linux kernel was built with support for them.
.SH SEE ALSO
.BR syscalls (2)
.SH COLOPHON
This page is part of release 5.13 of the Linux
.I man-pages
project.
A description of the project,
information about reporting bugs,
and the latest version of this page,
can be found at
\%https://www.kernel.org/doc/man\-pages/.
